LEAPS-MPS: Tailoring the Thermal Properties of Flexible Two-Dimensional (2D) Heterostructures

LEAPS-MPS：定制柔性二维 (2D) 异质结构的热性能

• 批准号: 2137883
• 负责人: Xian Zhang
• 金额: $ 25万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137883&HistoricalAwards=false
• 关键词: LEAPS; MPS; Tailoring; Thermal; Properties

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). NONTECHNICAL DESCRIPTION. Recent advances in atomically thin crystals derived from layered materials have enabled the creation of two-dimensional (2D) heterostructures with unique properties. These heterostructures have a variety of applications, including wearable devices, microelectronics cooling, and generation of electricity from waste heat (thermoelectricity). One challenge for flexible electronics based on 2D materials is managing heat under mechanical stress while maintaining performance. Further innovations require an efficient thermal control strategy to address this issue. The objective of this project is to examine the fundamental aspects of thermal transport in 2D heterostructures and achieve efficient thermal control via structural tailoring. This research advances the current frontiers of two-dimensional materials and devices. This study is expected to elucidate the essential thermal physics and open a new route for the exploration of future electronics by leveraging unique thermal properties of 2D materials and structures. This work addresses the grand challenge of global sustainable energy solutions by enabling innovative design solutions of electronic devices. The project will use thermal technology as a motivator to engage students via interactive games about the wave nature of thermal transport, workshops and curriculum crosslinking art and engineering, and mentorships for women students. The PI will work with a broad range of students, from K-12 to graduate students, with students with developmental delays and those underrepresented in STEM. This project will generate extraordinary materials and inspire students through educational activities. TECHNICAL DESCRIPTION. The research objective of this project is to investigate and control the fundamental thermal behavior in two-dimensional heterostructures via structural tailoring. Understanding structural effects on thermal properties will be harnessed to derive a learning-based framework and directly validated by experiments. Experimental approaches of materials synthesis, device nanofabrication and thermal characterization are emphasized and reinforced by analytical modeling and computer simulations. Specifically, a dual laser at same side opto-thermal Raman technique will be used to perform direction-dependent and anisotropic thermal characterizations on structurally tailored two-dimensional heterostructures. The proposed research activities, aiming at investigating new thermal physics and developing novel device technological precursors, provide a firsthand, in-depth understanding of how to control thermal behavior of two-dimensional materials via structural tailoring and provide a pathway to the development of innovative two-dimensional heterostructure devices with ultra-efficient performance. The outcome of this project is expected to be a major leap in fundamental understanding of structure-thermal couplings, enabling unprecedented thermal control methods, and revolutionize future electronic platforms.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项全部或部分由《2021年美国救援计划法案》（公法117-2）资助。非技术性的描述。从层状材料衍生的原子薄晶体的最新进展使具有独特性质的二维异质结构的创造成为可能。这些异质结构具有多种应用，包括可穿戴设备，微电子冷却和废热发电（热电）。基于2D材料的柔性电子产品面临的一个挑战是在保持性能的同时管理机械应力下的热量。进一步的创新需要一个有效的热控制策略来解决这个问题。该项目的目标是研究二维异质结构中热传输的基本方面，并通过结构剪裁实现有效的热控制。这项研究推动了当前二维材料和器件的前沿。这项研究有望阐明基本的热物理，并通过利用二维材料和结构的独特热性能，为探索未来的电子学开辟新的途径。这项工作通过实现电子设备的创新设计解决方案，解决了全球可持续能源解决方案的巨大挑战。该项目将利用热技术作为激励因素，通过关于热传输的波浪性质的互动游戏、将艺术与工程交叉的研讨会和课程，以及为女学生提供指导，吸引学生。PI将与广泛的学生合作，从K-12到研究生，有发育迟缓的学生和在STEM中代表性不足的学生。该项目将产生非凡的材料，并通过教育活动激励学生。技术描述。本课题的研究目标是通过结构裁剪来研究和控制二维异质结构的基本热行为。理解结构对热性能的影响将被用来推导一个基于学习的框架，并通过实验直接验证。通过分析建模和计算机模拟，强调并加强了材料合成、器件纳米制造和热表征的实验方法。具体而言，将使用同侧双激光光热拉曼技术对结构定制的二维异质结构进行方向相关和各向异性的热表征。该研究活动旨在研究新的热物理和开发新的器件技术前体，为如何通过结构定制控制二维材料的热行为提供第一手的，深入的理解，并为开发具有超高效性能的创新二维异质结构器件提供途径。该项目的成果有望成为对结构-热耦合基本理解的重大飞跃，实现前所未有的热控制方法，并彻底改变未来的电子平台。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

On the role of crystal defects on the lattice thermal conductivity of monolayer WSe2 (P63/mmc) thermoelectric materials by DFT calculation

• DOI: 10.1016/j.spmi.2021.107057
• 发表时间: 2021-07
• 期刊: Superlattices and Microstructures
• 影响因子: 3.1
• 作者: Yingtao Wang;Xian Zhang